Air-compressor.



No. 678,339. Patented July I6, 190|.

G. B. LITTLE.

AIR COMPRESSUB.

mpplication med p1- 27, 1901.)

' (nu Model.)

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UNITED vSnArEs PATENT OFFICE.

CLARENCE B. LITTLE, OE DAYTON, OHIO, AssIeNoE T'THE EROWNELL a Co., OFsAME PLACE. I

Ala-COMPRESSOR.

SFECIEICATION forming part of Letters Patent No. 678,839, dated July 16,1901.

Application filed April 27, 1901. Serial No. 57,760. (No model.)

T0 all 2077/0711, t may concern:

Be it known that I, CLARENCE B. LITTLE, a citizen of the United States,residing at Dayton, in the county of Montgomery and State of Ohio, haveinvented certain-new and use= ful Improvements in Air-Compressors; and Ido declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawing, and to the letters of reference marked theref on,which forms a part of this specification. This invention relates toimprovements in air-compressors, and has specific reference to thecylinder-head in which the valves are mounted and through which the airis admitted to the cylinder under suction.

-The object of the invention is to provide auxiliary valve or airchambers, by means of which the valves are prevented from entering thecylinder to any extentv whatever in cases where said valves becomebroken or detached from their stems.

With air-compressors as now generally in use much annoyance and expenseis incurred, owing to the valves becoming broken from their stems anddrawn into the cylinder,v

where they come in Contact with the moving piston and cause considerabledamage to the compressor, often causing a breakage of the walls of thecylinder or the cylinder-head. By means of my invention this trouble isovercome. The valves in case of breakage are prevented from entering thecylinder, and the'cylinder-head affords convenient means for removingthe valve or valves thus affected and the replacing of new valves.

Preceding a detail description of my invention reference is made to theaccompanying drawing, which shows a sectional elevation of aportion of acylinder, a portion of a cylinder-head, one of the valves and its cage,and one of the auxiliary chambers.

Describing more specifically the same, A designates acompressor-cylinder. Bis the piston therein. As before stated, thedrawing represents a portion of the cylinder adjacent to one of the valves. It will be understood that there is a number of such valvesarranged around the cylinder-head.

C ydesignates vthe cylinder-head, which is bolted to the cylinder bymeans of a series ot' bolts D. This cylinder-head has an annularinwardly-projecting liange C', which lits into the mouth of thecylinderand terminates in a laterally and inwardly extending flange C,which is provided with an air-opening E. The said head is provided withAa series of interior screw-threads E.

F designates a valve cage or casing which is screwed into the head. Whenthe valvecasing is thus screwed into position in the head, there isprovided a valve or air chamber G, which has a communication With thecompressor-cylinder through the opening E.

It is essential for the purposes of my invention that the diameter ofthe openingE be less than the diameterof the valve H. This valvemovesinto said Chamber G, as indicated by the dotted lines, when thevalve is dra-wn from its seat H by the moving piston. The

`valve-stem H'Vhas a bearing in a sleeve F',

which is an integral part of the valve-casing F, it being joined theretoby radial arms F.

I designates a valve-seating spring which acts upon the valve H to seatthe same when said valve is relieved of the pressure due to the movingpiston.

In air-compressors, as before stated, there is more or less troubleexperienced by the breaking of the valves at the stem. In such cases, asbefore intimated, the valve is drawn into the cylinder and is permittedto come in Contact with the moving piston, with the results as beforestated. This has been often known to occur in cases even where thebroken valve has not entirely entered the cylinder, but only a portionthereof has been known to project into said cylinder when a breakageoccurs.

It will be seen from the drawing of the present invention that in theevent the valve becomes detached from its stem it will fall, into thechamber G, and being of considerably greater diameter than the opening Eit IOO head. This is a feature vof great utility, as will be readily.recognized lby those .familiar with air-compressors.

Having described my invention, I claim- 1. In an air-compressor, thecombination 4,With-a compressor-cylinder, of a head lsecured thereto,the said head projecting in'toith'ecyb. inder and providing a chamberadapted 5tocontain a valve and into which a Valve is movable, an openingin said head forming a com-l munication between the cylinder and saidchamber, the diameter of suchopening being essentially smaller than thediameter of the Valve so that in the event of a breakage of said Valve,it will not be permitted to 'enter the cylinder, a Valve-casing mountedin said head, the said valve-casing and the valve 'forming the outeriimit of the chamber, substantially as and for the purposes specified.

2. In an air-compressor, the combination with a compressor-cylinder, ofa head secured Vthereto and having an auxiliary air-chamber.

.a valve-casing mounted in said head and forming the outer inclosure ofthe chamber,

so'that in the opening of the valve, the said Valve is conned withinsaid chamber, and

'whereby in the event of a breakage of said Valve, the latter will beprevented from entering,thecompressor-cylinder, substantially as shownand described.

In testimony whereof I affix my signature in presence of two witnesses.y

CLARENCE 4B. LITTLE.

Witnesses:

R. J MCCARTY', J. A. WORTMAN.

